Question

我正在尝试将文本文件myFile.txt上传到SkyDrive。以下是代码：

private async void btnUpload_Click( object sender, System.Windows.RoutedEventArgs e )
{
    Client = new LiveConnectClient( _session );
    string filename = "myFile.txt";

    var isolatedstorageFile= await ApplicationData.Current.LocalFolder.CreateFileAsync( filename, CreationCollisionOption.ReplaceExisting );

    using ( StreamWriter writer = new StreamWriter( await isolatedstorageFile.OpenStreamForWriteAsync() ) )
    {
        // convert to string
        var _String = Serialize( "this is a test file" );
        await writer.WriteAsync( _String );
    }

    await Client.BackgroundUploadAsync( FolderID, new Uri( isolatedstorageFile.Path ), OverwriteOption.Overwrite );
}

FolderID是全局的，其值为：＆＃34; folder.17ff6230f5f26b89.17FF6230F5F26B89！1533＆＃34;

问题在于定义BackgroundUploadAsync的第二个参数。我该如何解决它，即指定where＆＃34; myFile.txt＆＃34;的URI。 IsolatedStorage文件是？

谢谢，

Answer 1

你在BackgroundUploadAsync传递了3个参数，其中第一个是FolderId，第二个是文件的路径，这是错误的检查documentation first，第二个参数只取文件名而不是路径文件，第三个是文件流。

此外，您可以使用UploadAsync代替BackgroundUploadAsync。

    IsolatedStorageFileStream isfs = isf.OpenFile(FileName, FileMode.Open, FileAccess.Read);

    var res = await client.UploadAsync(folderId, FileName, isfs, OverwriteOption.Overwrite);

Answer 2

使用this link作为参考。

您在上传时遇到问题，我想这是因为您尝试上传不在隔离存储中的共享/传输文件夹中的文件。所以只需在共享/传输中创建文件，然后尝试将文件上传到天空驱动器。

Answer 3

要使用BackgroundUploadAsync方法从隔离存储上载文件，您需要文件的正确URI。访问存储在独立存储中的文件的路径为/shared/transfers/。因此，要将URI参数传递给方法，请将/shared/transfers/预先附加到文件名。这将是有效的URI。见下文：

await Client.BackgroundUploadAsync(FolderID, new Uri("/shared/transfers/" + fileName, UriKind.Relative), OverwriteOption.Overwrite );

另一种选择是使用UploadAsync方法并附加流。

Answer 4

感谢我收到的所有指示。重写了这个功能，就像这样：

    private async void btnUpload_Click( object sender, System.Windows.RoutedEventArgs e )
        {
        string filename = "myFile.txt";

        StorageFolder folder = await ApplicationData.Current.LocalFolder.CreateFolderAsync( "Shared", CreationCollisionOption.OpenIfExists );
        folder = await folder.CreateFolderAsync( "transfers", CreationCollisionOption.OpenIfExists );

        var isolatedstorageFile= await folder.CreateFileAsync( filename, CreationCollisionOption.ReplaceExisting );
        using ( StreamWriter writer = new StreamWriter( await isolatedstorageFile.OpenStreamForWriteAsync() ) )
            {
            // convert to string
            var _String = Serialize( "this is a test file" );
            await writer.WriteAsync( _String );
            }

        await LiveHelper.Client.BackgroundUploadAsync( FolderID, new Uri( "/shared/transfers/" + filename, UriKind.Relative ), OverwriteOption.Overwrite );
        }


    private static string Serialize( object objectToSerialize )
        {
        using ( MemoryStream _Stream = new MemoryStream() )
            {
            try
                {
                var _Serializer = new DataContractJsonSerializer( objectToSerialize.GetType() );
                _Serializer.WriteObject( _Stream, objectToSerialize );
                _Stream.Position = 0;
                StreamReader _Reader = new StreamReader( _Stream );
                return _Reader.ReadToEnd();
                }
            catch ( Exception e )
                {
                Debug.WriteLine( "\n******** Serialize:" + e.Message );
                return string.Empty;
                }
            }
        }

文件已上传到正确的FolderID。

埃坦

Answer 5

要将文件上传到Skydrive，该文件应保存在IsolatedStorage的“/ shared / transfers /”文件夹中。 LiveConnectClient只能从/向“/ shared / transfers /".

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如何将文件从IsolatedStorage上传到SkyDrive？

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